document.write（）不能在Firefox的userscript中工作 [英] document.write() not working in userscript with Firefox
问题描述
我有一些使用脚本的脚本，它们使用
var tab = window.open（''，'_blank'）;
tab.document.write（myCustomHtml）;
tab.document.close（）;
向用户显示一个输出（myCustomHtml是我之前在代码中定义的一些有效的HTML）。它从27版开始在Firefox中工作，现在我只能得到一个空文档。没有任何控制台错误。
新打开的文档在使用Firefox的控制台进行检查时只有这个内容
< HTML>
< head>< / head>
< body>
< / body>
< / html>
，而源代码为空。
代码适用于Chrome。
我需要对新版Firefox（27+）和更新的Greasemonkey（1.15）进行任何修改吗？
这是一个测试脚本
// == UserScript ==
// @name document.write（）test
// @namespace stackoverflow.com
// @description测试文档.write（）
// @include https://stackoverflow.com/questions/22651334/*
// @include http://stackoverflow.com/questions/22651334/*
// @version 0.0.1
// == / UserScript ==
var tab = window.open（''，'_blank'）;
tab.document.write（'< html>< head>< / head>< body>< ul>< li> a< / li>< li> b< / li> <李>℃下/立GT;< / UL>< /体>< / HTML>'）;
tab.document.close（）;
我不确定Greasemonkey或Firefox是否有错误这个，但是 window.open 从一个Greasemonkey脚本到一个空白页面，现在触发一个同源策略违规。
同时，页面范围，控制台范围和Firebug控制台都正常工作。
Greasemonkey作用域给出：
$ b
SecurityError：操作不安全
>
是否使用 @grant none
这加上 GM_openInTab（）的一般无用性，让我怀疑它是一个Greasemonkey错误。我现在没有时间查看它，但是如果你有提交错误报告为了得到这个最新版本的Firefox（28.0）和Greasemonkey（1.15）的功能，下面是我必须做的：
- 告诉我的弹出窗口阻止程序（暂时）允许来自stackoverflow.com的弹出窗口。
- 将弹出代码注入页面范围。
- 使用显式的
about：blank作为URL。 - 等待新窗口加载。
这是一个完整的脚本，适用于最新的FF + GM版本 p>
// == UserScript ==
// @name document.write（）test
// @描述测试document.write（）
// @include http://stackoverflow.com/questions/22651334/*
// == / UserScript ==
function fireNewTab （）{
var newTab = window.open（'about：blank'，'_bl ANK）;
newTab.addEventListener（
load，
function（）{
// ---现在按需要处理popup / tab
var destDoc = newTab.document;
destDoc.open（）;
destDoc.write（'< html>< head>< / head>< body>< ul>< li> a< / li>< li> b< / li>< li> c< / li>< / ul>< / body>< / html>'）;
destDoc.close（）;
}，
false
）;
}
addJS_Node（null，null，fireNewTab）;
function addJS_Node（text，s_URL，funcToRun，runOnLoad）{
var D = document;
var scriptNode = D.createElement（'script'）;
if（runOnLoad）{
scriptNode.addEventListener（load，runOnLoad，false）;
}
scriptNode.type =text / javascript;
if（text）scriptNode.textContent = text;
if（s_URL）scriptNode.src = s_URL;
if（funcToRun）scriptNode.textContent ='（'+ funcToRun.toString（）+'）（）';
var targ = D.getElementsByTagName（'head'）[0] || D.body || D.documentElement;
targ.appendChild（scriptNode）;
}
I have some userscripts that use
var tab = window.open('', '_blank');
tab.document.write(myCustomHtml);
tab.document.close();
to show an output to the user (myCustomHtml being some valid HTML I defined previously in the code). It sopped working in Firefox since version 27, now I only get an empty document. No console errors whatsoever.
The newly opened document has only this content when inspected with Firefox' console
<html>
<head></head>
<body>
</body>
</html>
while the source code is empty.
The code works in Chrome.
Do I need to make any modification for newer Firefox versions (27+) and an updated Greasemonkey (1.15)? I haven't found any recent bug reported to Firefox about this issue.
Here's a test script
// ==UserScript==
// @name document.write() test
// @namespace stackoverflow.com
// @description tests document.write()
// @include https://stackoverflow.com/questions/22651334/*
// @include http://stackoverflow.com/questions/22651334/*
// @version 0.0.1
// ==/UserScript==
var tab = window.open('', '_blank');
tab.document.write('<html><head></head><body><ul><li>a</li><li>b</li><li>c</li></ul></body></html>');
tab.document.close();
I'm not sure if Greasemonkey or Firefox has buggered this, but window.open to a blank page, from a Greasemonkey script, now triggers a Same Origin Policy violation.
Meanwhile, Page scope, the console scope, and Firebug's console all work fine.
Greasemonkey scope gives:
SecurityError: The operation is insecure
whether @grant none is used or not.
This, plus the general uselessness of GM_openInTab(), lead me to suspect it is a Greasemonkey bug. I don't have time to look into it right now, but file a bug report, if you wish.
To get this to work on the latest release of Firefox (28.0) and Greasemonkey (1.15), here's what I had to do:
- Tell my popup blockers to (temporarily) allow popups from stackoverflow.com.
- Inject the popup code into the page scope.
- Use an explicit
about:blankfor the URL. - Wait for the new window to load.
Here's a complete script that works on the latest FF+GM releases:
// ==UserScript==
// @name document.write () test
// @description tests document.write ()
// @include http://stackoverflow.com/questions/22651334/*
// ==/UserScript==
function fireNewTab () {
var newTab = window.open ('about:blank', '_blank');
newTab.addEventListener (
"load",
function () {
//--- Now process the popup/tab, as desired.
var destDoc = newTab.document;
destDoc.open ();
destDoc.write ('<html><head></head><body><ul><li>a</li><li>b</li><li>c</li></ul></body></html>');
destDoc.close ();
},
false
);
}
addJS_Node (null, null, fireNewTab);
function addJS_Node (text, s_URL, funcToRun, runOnLoad) {
var D = document;
var scriptNode = D.createElement ('script');
if (runOnLoad) {
scriptNode.addEventListener ("load", runOnLoad, false);
}
scriptNode.type = "text/javascript";
if (text) scriptNode.textContent = text;
if (s_URL) scriptNode.src = s_URL;
if (funcToRun) scriptNode.textContent = '(' + funcToRun.toString() + ')()';
var targ = D.getElementsByTagName ('head')[0] || D.body || D.documentElement;
targ.appendChild (scriptNode);
}
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